ISIS Neutron and Muon Source Data Journal

Determination of Exact Structural Symmetries in LaFeAs1-xPxO

Abstract: LaFeAs1-xPxO has recently been proposed to display unusual properties as a function of P doping with two distinct superconducting (SC) domes separated by a possible AFM phase as suggested by NMR spectroscopy. Initial neutron diffraction data obtained over this composition range (0.4 < x < 0.7) failed to reveal the existence of long range magnetic order between the SC domes. The absence of any obvious physical ground state is difficult to understand especially in a range where superconductivity is clearly suppressed without any apparent driving force! Recently, we performed preliminary proof-of-principle measurements using muon spin rotation at EMU and neutron diffraction (long data collection time) on WISH and successfully proved the existence of at least two magnetic phases at different P contents. Careful measurements are needed on WISH, HRPD and EMU as described in the proposal.

Principal Investigator: Dr Omar Chmaissem
Experimenter: Dr Stephan Rosenkranz
Experimenter: Mr Ryan Stadel
Experimenter: Dr Pascal Manuel
Local Contact: Dr Alexandra Gibbs

DOI: 10.5286/ISIS.E.RB1910422

ISIS Experiment Number: RB1910422

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Omar Chmaissem et al; (2019): Determination of Exact Structural Symmetries in LaFeAs1-xPxO, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910422

Data is released under the CC-BY-4.0 license.